Effect of microstructure, grain size, and rare earth doping on the electrorheological performance of nanosized particle materials

Synthesis, Structural and Luminescence Studies of Pyrochlore Phase Free TiO2:Dy3+ Produced by Solid‐state Reaction Method

“…observed the formation of pyrochlore phase Eu 2 Ti 2 O 7 at 800°C in the preparation of Eu‐doped TiO 2 by electrospinning technique . A similar pyrochlore phase Y 2 Ti 2 O 7 was detected by Ma et al . for the TiO 2 ‐Y 2 O 3 system at 700°C, using solgel method.…”

“…However, Alessandra et al observed the formation of pyrochlore phase Eu 2 Ti 2 O 7 at 800°C in the preparation of Eu-doped TiO 2 by electrospinning technique. 22 A similar pyrochlore phase Y 2 Ti 2 O 7 was detected by Ma et al 23 for the TiO 2 -Y 2 O 3 system at 700°C, using solgel method. In this work, it is shown the possible production at 800°C of Dy 3+ -doped TiO 2 without Dy 2 Ti 2 O 7 phase, using solid-state reaction.…”

Synthesis and electrorheological performance of particle materials of doped TiO2 with Er2O3

“…From the above conclusions we consider that the surface area of the particles, which is related to the pore volume and grain size in the particles, directly affects the interfacial polarization and the amount of charge on the surface of the particles. In previous studies [9], we found that large surface area, especially large pore volume, is advantageous for enhancing ER activity of a particle material. Zhao and Yin also found that the mesoporous Ce-doped TiO 2 material, which has larger surface areas, has better ER activity than the single Ce-doped TiO 2 material, for which the surface areas are smaller [4c].…”

A new class of electrorheological material, preparation and electrorheological property of K2O-doped Y2O3 material

“…Zhao and Yin [11] considered that the lattice distortion and defects in the TiO 2 crystal caused by substitution for Ti 4+ with large-radius RE ions may be responsible for the modification of the dielectric and conduction properties of TiO 2 and the obvious improvement in ER effect of the material. In previous studies [15], we found that the microstructure including the crystal structure type, surface area and pore volume are important factors in influencing ER activity of a particle material. Nevertheless, to date, there is no clear relation established between the ER activity and the microstructure of dispersed particles.…”